MacOS – What terminal commands are new or updated in Mountain Lion

Well, these commands edit .plist files in your /Users/xyz/Library/Preferences folder. So, if you look at these files, you can look at these files and base your Terminal commands after these.

These are XML-based files, so you can view them in a more readable format if you open them in Xcode, which is available in the Mac App Store.

In the Terminal, the format for these is "defaults write PLIST_FILE KEY -TYPE VALUE" where the PLIST_FILE is the name of the file in the Preferences folder without the .plist, KEY is the key that you can see in Xcode, -TYPE is the type of key that you can find Xcode (and you can find if there is an abbreviation for that type by typing "defaults" into the terminal), and value is the value you wish to set the key at.

Here are some of the string types from the Terminal:

-string <string_value>
-data <hex_digits>
-int[eger] <integer_value>
-float  <floating-point_value>
-bool[ean] (true | false | yes | no)
-date <date_rep>
-array <value1> <value2> ...
-array-add <value1> <value2> ...
-dict <key1> <value1> <key2> <value2> ...
-dict-add <key1> <value1> ...

Of course. In adding features, the behavior of previous features changes, not always for the better.

If you find features that were present in Lion but missing in Mountain Lion, please edit this answer to add your contributions to this list.

• Mountain Lion drops support for some models of Macs supported by Lion.

• Clicking the top right corner no longer triggers Spotlight (Spotlight's menubar icon is still present, adjacent to the new Notification Center icon).

• The battery indicator in the menubar will no longer offer to show the remaining time.

• X11.app is included, but that app alone no longer provides X11 functionality. When the user first runs X11.app – or an app that requires X11 – a dialogue guides the user to Apple's article HT5293 about XQuartz, which provides the functionality.

• Mail.app and Safari.app drop support for RSS Feeds.